Italy-based Eighteen Sound this week announced the 18iD extended low frequency neodymium transducer. The new subwoofer is engineered for maximum power transfer when operated with Class D and similar (iPal compatible) amplifiers and is designed for vented and bandpass subwoofer cabinets. It works best with amplifiers capable of delivering 2,600 watts of power (10,000-watt peak).
The transducer features a 5.3-inch inside-outside ISV (Interleaved Sandwich Voice) coil. A low-density material air diffractor placed into the heatsink acts as a cooling system, increasing the power handling capability and lowering the power compression figure.
The 18iD is able to perform under inclement weather conditions, utilizing cone treatment that Eighteen Sound says provides water repellent properties to both sides of the cone. A special coating applied to both the top and back plates makes the transducer far more resistant to the corrosive effects of salts and oxidization.